QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

2 km E of Anthony, Kansas

· 5.6 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 7 kmGrant County 45 kmSumner County 46 kmKingman County 46 kmAlfalfa County 55 kmBarber County 61 kmSedgwick County 76 kmKay County 85 kmPratt County 86 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.1 (ml)
Depth
5.6 km below the surface
Felt
no reports yet
Nearest
Harper County, 7 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3758 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 37.1513, -98.0002. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, KS 7 km (4 mi) SE of here earthquakes near Harper County
Grant County, OK 45 km (28 mi) NNW of here earthquakes near Grant County
Sumner County, KS 46 km (29 mi) WSW of here earthquakes near Sumner County
Kingman County, KS 46 km (29 mi) SSE of here earthquakes near Kingman County
Alfalfa County, OK 55 km (34 mi) NNE of here earthquakes near Alfalfa County
Barber County, KS 61 km (38 mi) E of here earthquakes near Barber County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

55 earthquakes have been recorded within 50 km since this one.

  1. 1.8 5 km W of Argonia, Kansas
  2. 1.9 4 km WSW of Bluff City, Kansas
  3. 1.7 5 km SE of Manchester, Oklahoma
  4. 1.7 3 km ENE of Freeport, Kansas
  5. 3.4 10 km SSW of Spivey, Kansas
  6. 1.7 5 km ENE of Mayfield, Kansas
  7. 1.6 3 km ENE of Freeport, Kansas
  8. 1.7 5 km SSE of Harper, Kansas
  9. 1.6 6 km SSE of Harper, Kansas
  10. 2.6 7 km SSW of Cheney, Kansas
  11. 3.1 4 km ESE of Caldwell, Kansas
  12. 1.8 5 km ENE of Mayfield, Kansas
  13. 1.5 3 km NW of Anthony, Kansas
  14. 1.5 8 km NNW of Argonia, Kansas
  15. 2.5 5 km WNW of Renfrow, Oklahoma

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

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